Digital control circuit board, digital control system and digital control lathe

The utility model relates to a digital control circuit board, digital control system and digital control lathe, the digital control circuit board includes: the motion control circuit board with be provided the main control circuit board on the motion control circuit board, the motion control circuit board includes first chip, the main control circuit board includes the second chip, second chip top is equipped with heat abstractor, heat abstractor is including heat dissipation support, radiating fin, heat conduction post, heat conduction pad, the heat dissipation support is fixed on the main control circuit board, and the radiating fin laminating is at heat dissipation support upper surface, heat dissipation support middle part is seted up porosely, and heat conduction post upper surface passes this hole and radiating fin contact, and the lower surface of heat conduction post is through heat conduction pad and the contact of second chip. The utility model provides a bilayer structure of the main control circuit board and motion control circuit board to set up the heat radiating area that heat dissipation support and heat conduction post increase main control chip, this kind of structure is favorable to the modularization of circuit board to upgrade or change the radiating effect of having improved main control chip simultaneously.